Fire extinguisher



K1 SCHMIDT FIRE EXTINGU'IS'HER Filed Feb. 1; 1924 1o of the type under consideration, as in the Patented Aug. 9, 1927.

T t a -a ma SCHMIDT J E t GERMANYLI App'lication filed Februaryv 1, 1924,- Serial NOQ690,023,' and..in Germany February, 1, 1923..

My invention relates to fire extinguishers with siphon arrangement and a stop valve at the discharge pipe. In the ordinary extinguishers with a discharge pipe which do snot possess a siphon arrangement, the discharge pipe acts duringthe'charging, pro

vided they are turned upside down, as an overflow, so that the prescribed air space is produced automatically. This efiect can, however, not take place in fireextlnguishers v inverted charging position the: discharge pipeis'closed'by the stop valve. .The siphon "pipe, or pipes, of which twoare generally employech can, however, not beutilized for producing the air space, either because when.

' the liquidrises in'the apparatus during the charging, up: to the bend 'or' knee; of the siphon pipes, these pipes commence to act 20 as siphons, so that through-them and the spraying nozzle not only the surplus of liq uid chargedinto the apparatus flows oii' eliminate this drawback by carrying the knee of the siphon pipes up ashigh asposk sible, that means closeup to the bottom of the extinguisher shell, so that it, was no longer reached "by the liquid rising in the simultaneously housing the valve, which-is *destined to'close the discharge pipe during the operation of the siphon pipes when the extinguisher is in use, during the duration of the chargingprocess ina pocket-like extension of the valve casing; The manipulation of the extinguisher in order'to'con i jvey the ball valve into this pocket-like ex "tension or trap ofiers, however, some dii'hculabsenceof which the extinguisher may be overcharged or partly or entlrely discharged tube branches off, which allows air to enter but sometimes the entire contents of the ex; tinguisher. Attempts have been .made to extinguisher during the charging, and by ties to the 'unexper enced operator, or" at least.cle1nancls h1s special .HttBDtlOD 1n the by the action of the siphon pipe started To avoid that the siphon tubes act as si charge pipe 1). intothe siphontube or tubes, so that the the siphon pipes are arrangedat that-level up to wvhich the extinguisher should-be charged. In order that'during theioperation of the extinguishert-he' siphon pipes may again act as siphon the before 1nen-.

tio'nedair inlet-tube joined at the apex of the siphon must be closed again after thecharging of the extinguisher. This may bef effected by carryingfthernmall tube ,up to the edge of the charging'opening ofy'the extinguish-er, so that during the. closing of '5 this opening by means-of the closing piece 'itrwi ll simultaneously be sealed by its packing disc.

valve :of the 'dischargepipe may be con-] structed considerablyysimpler and vmore suitable,inasmuchasa pipejsinsertedinto thezvalv-e chest, whichfterminates-at some distance from the. valve seat, guides the ball valve and withdraws it: from the action In adopting this arrangement the stop= of the liquid flowing into thevalve chamber duringthe rejection; of the extinguishing discharge pipe. 7 tion demands only about two thirds offthe maybe perforated up to its cover and need not havean unpertorated portion of con- 'siderable height, as heretofore.

The accompanying drawing 1 embodiment of my IDVGIltlOII. p v

' Fig. 1 s a'verticallongitudinal section llustrates an during the operation otthe siphon pipe.

The same lettersof reference indicate ingp,

a discharge pipe 3) and one or a plurality of siphon pipes c. On the drawing only.

one pipe 0 is shown; In'known manner pipes]? and c end-1n chamber a which-in turn communicateswith nozzle t- The'casing d contains. the valve." sealing the dis The knee or bend of the siphon pipe 0 is situated at that level up liquid use the extinguishe hr h I A valve of this construe-I" height of the valves hitherto employed in apparatus of thiskind, as the valve casing through the improvedextinguisher and: i i Fig. 2 1s a section through the casing or the valve which 7 seals the; discharge piper to which the level ofthe: extinguishing liquid should rise during the charging or the ap paratus; "From the knee of the siphon p1pe branehes oti a, thin tube. g, which extends up, i

l to 'the'xout'er"sealing face ofthe charging v hranch' i so that the packing plate iofthe [sealing piece m.wh1ch 1s screwed on the threads of the .lillirig-opening 72, and closes 1 the charging opening is simultaneously 1 closesthe' inouth ofthe sin'all tnhe' g. A If a I plurality "offsi'phon: pipes are employed the 's'malltubes,g -lnayibe united to 01111 a sinisthen closed by, the pack I "Ihis pipe terminates in front of the seat surface tor the hall valve 6 at a distance, which corresponds approximately with the width of tl' e annnlar space g between the ijcasing'cl and the pipe'o. As shown the drawing the ball ,6 is, entirely witlidrawn i rorn'theinfluences 'o'f the liquidflowing in ."f through-the openings? when squirting upwards with theextinguisher. In contradis- 'tinction to the hitherto ltn own valves for. V fire extinguishers o't'the"described type, the, ibotto nfn; of the valve chamber may also possess inlet openingsffor the extinguishingfliqnid' oppositethe annular space 9.

will be understood that I do giot limit nyse'lf to the eXact Construction shown and described but the" modifications within ethe ambiteff/the claims will easily suggest thenn selves-to thosefskilled in'the art.

' opening.

lVhat. I claim asinyinvention and desire I to securehy LettersjPatent is;-

pipe havingits bendat the charge 1evel,and an air-'ii'ilet tube'connected to said pipe at itsloend. v 5 77 7 2-.I11'alire extinguisher, a siphon outlet pipe having its bend-at the charge level, 5 1

an air inlet connected to :said pipe at its bend, andineans tor closing said-tube,

In a lire @XtlllglllSllEtI,*tL-SlPllOll=0L1tlel3- pipe having bendf'at the charge level, an air lnlet' tube eonnee'ted to SELlQl pipe at its bend, sald' tube debouchlngxatq thelilllng l. In a: fire extinguishena siphon outlet} opening of the eXtinguishen and common '7 closure means for said tube and the filling in a lire extinguisher, a discharge pipe, a-ba ll valve at the influentend of said, pipe, and a sleeve within said pipe into which saidhall'nioves; when the extinguisher is in operative position, said sleeve actin'gto. pre

vent the innowing fluid from moving the ball against its seat. I 1 Z Bil-L ValVeCODlPllSlIlg a cup having a conaid-constricted outlet-by gravity upon tilt ngcnp into which said ball isvadaptedtoroll of :the 'valve, ',and'-a sleeve within said ve5 ptricted utlet, hall-adapted 'toz'seat against onztilting of the valve in the-opposite di--' reetion, said sleeve acting to prevent the fluid flowing through said-Cupv fronr noving the ballgagainst its seat. H

I In testiniony whereof I. alii'xinysignat nre; I

KARL" soniiinrf 

